Cyclophosphazene compound, lubricant containing same, and magnetic disk

Abstract

A compound of the formula ( 1 ), lubricant containing the compound and magnetic disk (P 3 N 3 )—[R 1 -R 2 ] 6   (1) wherein R 1 is —OCH 2 CF 2 O(CF 2 CF 2 O) x (CF 2 O) y CF 2 CH 2 O—, or —OCH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 O) Z CF 2 CH 2 O— or —OCH 2 CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) n CF 2 CF 2 CF 2 CH 2 O—, x and y are each an integer of 0 to 15, z is an integer of 1 to 15, n is an integer of 0 to 20, R 2 is hydrogen, hydroxyalkyl, amino or amido.

1 . A compound of the formula (1)
   (P 3 N 3 )—[R 1 -R 2 ] 6   (1)
   
       wherein R 1  is —OCH 2 CF 2 O(CF 2 CF 2 O) x (CF 2 O) y CF 2 CH 2 O—, or —OCH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 O) z CF 2 CF 2 CH 2 O— or —OCH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) n CF 2 CF 2 CF 2 CH 2 O—, X and y are each an integer of 0 to 15, z is an integer of 1 to 15, n is an integer of 0 to 20, R 2  is hydrogen, hydroxyalkyl, amino or amido. 
     
     
         2 . A compound as defined in  claim 1  wherein x and y are each a real number of 0 to 10, z is a real number of 1 to 10 and n is a real number of 0 to 4. 
     
     
         3 . A lubricant containing a compound of the formula (1)
   (P 3 N 3 )—[R 1 -R 2 ] 6   (1)
   
       wherein R 1  is —OCH 2 CF 2 O(CF 2 CF 2 O) x (CF 2 O) y CF 2 CH 2 O—, or —OCH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 O) z CF 2 CF 2 CH 2 O— or —OCH 2 CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) n CF 2 CF 2 CF 2 CH 2 O—, x and y are each an integer of 0 to 15, z is an integer of 1 to 15, n is an integer of 0 to 20, R 2  is hydrogen, hydroxyalkyl, amino or amido. 
     
     
         4 . A lubricant as defined in  claim 3  wherein x and y are each a real number of 0 to 10, z is a real number of 1 to 10 and n is a real number of 0 to 4. 
     
     
         5 . A magnetic disk comprising at least a recording layer and a protective layer formed over a substrate, and a lubricating layer formed over the resulting surface, the lubricating layer containing a compound of the formula (1).
   (P 3 N 3 )—[R 1 -R 2 ] 6   (1)
   
       wherein R 1  is —OCH 2 CF 2 O(CF 2 CF 2 O) x (CF 2 O) y CF 2 CH 2 O—, or —OCH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 O) z CF 2 CF 2 CH 2 O— or —OCH 2 CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) n CF 2 CF 2 CF 2 CF 2 CH 2 O—, x and y are each an integer of 0 to 15, z is an integer of 1 to 15, n is an integer of 0 to 20, R 2  is hydrogen, hydroxyalkyl, amino or amido. 
     
     
         6 . A magnetic disk as defined in  claim 5  wherein x and y are each a real number of 0 to 10, z is a real number of 1 to 10 and n is a real number of 0 to 4. 
     
     
         7 . A compound as defined in  claim 1  wherein the hydroxyalkyl is —CH 2 CH(OH)CH 2 OH, —CH 2 CH(OH)CH 2 OCH 2 CH(OH)CH 2 OH or —(CH 2 ) m OH, m is an integer of 2 to 6. 
     
     
         8 . A compound as defined in  claim 1  wherein the amino is (alkyl group having 1 to 6 carbon atoms) 2 N— or (NH 2 -alkylene group having 1 to 4 carbon atoms) 2 N—. 
     
     
         9 . A compound as defined in  claim 1  wherein the amido is (alkyl group having 1 to 4 carbon atoms) 2 NCO—.